{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "discover vulnerability", "arguments": ["discoverer", "capabilities", "supported platform", "vulnerable system version", "time", "common vulnerabilities and exposures", "vulnerable system", "vulnerable system owner", "vulnerability"]}], "input": "Security researchers at Preempt say they discovered and disclosed this vulnerability to Microsoft last August , and Microsoft has been working since then to create the patch released this week ."}
{"discover vulnerability": []}